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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Juan Rojas# | 0.000 | 2035 | |
| 2 | Kazuma Nishida# | 1.149 | 2034 | |
| 3 | Juan Martínez# | 2.935 | 2029 | |
| 4 | Patrick Harris# | 3.566 | 2035 | |
| 5 | Javier Pérez# | 4.000 | 2035 | |
| 6 | Gustavo Cantú# | 5.712 | 2035 |
